These are actually just two names for the same thing. This type of metal halide bulb uses ceramic as part of the lamp just like an HPS. As a result, CMH bulbs are more efficient than regular MH lights (though still not as efficient as HPS bulbs).
More Light = Bigger Yields!
(up to a point, it is possible to give your plant too much light!)
If you get very high-wattage LEDs, you may need to vent out heat to keep the grow space cool
Pros and Cons of HID Grow Lights
High Pressure Sodium grow lights are often used during the flowering stage because they are very efficient and their yellow light stimulates bud production. HPS grow lights in the flowering stage get better yields per watt of electricity than any other type of grow light available today, which is a big part of why they are so popular.
Note 2: Incandescent light bulbs (old fashioned light bulbs) are NOT suitable for growing marijuana!
Fluorescents are a great choice for clones, young plants, supplemental lighting and can save you money on electricity in the vegetative stage compared to using high power lights when plants are too young to use it all anyway. They can also be used to flower plants in spaces that are shorter than what’s possible with other grow lights (aka ‘stealth growing’).
The light from an HPS appears yellow, and is great for flowering plants because the light spectrum stimulates bud production
What are the benefits? …
Although this model doesn’t offer vertical positioning like the EnviroGro FLT24, it does offer two modes of light. Switching off some of the tubes allows for dimmer light that works better for times when you need it a little darker.
CFL vs. T5 Tube Fluorescent Bulbs
You can buy this product in multiple versions. First off, you can choose between 2ft or 4ft lights. Then, you can decide whether you want two, four, or eight tubes. The EnviroGro bulbs have a sturdy, reliable construction and come pre-assembled. All you need to do is plug it in.
The Durolux T5 grow lights have a super high light output of 20,000 lumen. The four tubes come in a German Hammertone Reflector, which provides 30% more light output. Each bulb is 6500K and measures 4ft. There are hanging hooks featured to help you position the lamp overhead.
4. Durolux T5 Grow Light (4ft) Dl844S Ho Fluorescent Hydroponic Fixture
Please note that this bulb is not the best on the market. However, it is cheap and will do the job in the smallest grow tents.